Out of O, P, S, Al and B: which ones show a tendency to gain electrons and which ones show a tendency to lose?

Question

Also... Out of those elements... which is the largest? And how can you tell???

Answer 1

Sulphur would be the biggest atom because it has the most protons, electrons, & neutrons.

Those with a tendancy to gain electrons are further to the right of the periodic table. This inlcudes O, S and P (to a lesser extent).
Al and B are further to the left on the periodic table and would have a tencancy to lose electrons.

Answer 2

look at the periodic table. if you understand trends it's the key. if you don't open the text or go talk to your teacher